Crushing-mill.



J. 0. MILLAR. CRUSHING MILL.

APPLICATION FILED SEPT-26, I908.

Patented ay 18, 1915.

3 SHEETSSHEET I.

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J. D. MILLAR.

,CRUSH ING MILL. APPLICATION FILED SEPT-26, I908.

Patented May 18, 1 915.

3 SHEETS-SHEET 2.

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J. 0. MILLAR.

CRUSHING MILL. APPLICATION FILED SEPT. 26, I908.

I 1,139,79m Patented May18,1915.

3 SHEETS-SHEET 3- UNETED %TATE% PATENT @FFKQE.

JAMES D. MIL LAR, 0F MILWAUKEE, WISCONSIN, ASSIGNOR TO EDWARD IE. MQOOOL, OF VICTOR, COLORADO.

CRUSHING-MILL.

Specification of Letters Patent.

Patented May 1%, 19315..

Application filed September 26, 1908. Serial No. 454,908.

To all whom it may concern Be it known that 1, JAMES I). MILLAR, residing in Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented new and useful Improvements in Crushing-Mills, of which the following is a description, reference being had to the accompanying'drawings, which are a part of this specification.

This invention has for its object to provide a crushing mill suitable for reducing small particles of'cement rock, ore and the like to a finely divided state.

Another object of the invention is to provide such a crushing mill in which the crushing action is produced between a pair 'of crushing heads, one or both. of which being given a revolving movement with or without a combined rotary movement to effect an even crushing action throughout the surface of the crushing faces thereof and to constantly change from one .active area to another.

Another object of the invention is to accomplish such combined revolving and rotary movements of a crushing head by,

I mounting said head upon a spindle having an eccentric bearing within a suitably driven rotary sleeve, and providing means for gearing the spindle with the sleeve.

Another object of the invention is to accomplish such gearing from the rotating sleeve to the revolving spindle by means of an eccentric pinion on a counter-shaft which is geared to the sleeve, saidpinion meshing with a gear on the spindle and its eccentric mounting serving to keep it 1n mesh with said gear notwithstanding the movement of the gear toward and away from thecounter shaft by reason of the revolving movements thereof.

Another object of the invention is to provide means for facilitating the clearing of the crushing surfaces in a crushing mill by forcing a blast of air or other fluid between the crushing heads. i

I desire it to be understood that this invention is not limited to any specific form or arran ement of parts except in so far as such limitations are specified in theclaims.

With the above and other. objects in view the invention consists in the crushing mill herein claimed, its parts and combinations of parts and all equivalents.

Referring to the accompanymg drawings reason of its eccentric hearing; within said in which like characters of reference indicate the same parts in the different views F lgure l is a vertical sectional View of a crushing mill constructed in accordance with this invention; F igl 2 is a plan view thereof with a portion of the casing broken away; Fig. 3 is a sectional view of the upper crushing head; Fig. 4 is a sectional plan View of a portion of the machine on the plane of line 44 of Fig. 1; and, Figs. 5,

6 and 7 are diagrams showing the relative positions of the respective gears in difl'erent positions of the sleeve.

A In these drawings 10 indicates a base on which sectional columns or standards 11 are securedly mounted, there? preferably, being three of such standards, as shown in Fig. 2, with their upper ends turned inwardly and uniting to. form a bearing 12.

Atconvenient points on the standards are inwardly extending arms 13 uniting toform other bearings, 14, 15v and 16 respectively.

A sectional casing 17 is secured between the bearings 14 and 15 and is also attached to the standards 11 to be firmly held in place. The two crushing heads, 18 and 1?}, are contained within this casing and each is provided with a removable facing 20, desirably of soft steel or other suitable material which will have the tendency to become coated with some of the harder particles ofmaterial being crushed by such particles becoming embedded therein and thus constituting a hard crushing or grinding surface to act against the other particles of material, instead of effecting the crushing or grinding action upon the surface of the facing direct, I

The crushing head 19 is carried by a tu bular spindle 21 which is journaledtwithin an ecentric bore of a sleeve 22, the said sleeve being journaled in the bearings 12 and 14 of the frame. There are roller bearings 23 between the spindle 21 and the sleeve 22 and also between the sleeie 22 and 100 I bearing 14 and a roller thrust bearing 25 supports the spindle 21 with its crushing head 19 upon the upper end of the sleeve 22. 105

A drivingpullev 26 is mounted on the sleeve 22 for turning the same, thereby causing the crushing .head 19 to move in an orbit by sleeve.

' own axis,

1 pinion 30 serving to The crushing head in addition to the re- .volving movement thus received is given a the countershaft due to the-revolving movements of the .spindle.

. The plan view of Fig. 2 shows the relation of the gearing when the eccentric mounting of the spindle 21 causes the 7 gear wheel 31 carried thereby to come the nearest to counter shaft 29, the eccentrically mounted pinion 30 in the meantime being in a position to present its shortest distance from center to periphery toward the gear 31. The driving pulley center a and the center I; of the gear wheel 31 and the center 0 of the counter shaft 29 and v ion 30 being in a straight line in the order named.

Inthe diagram of Fig. 5 the parts are indicated in outline as having been moved to an extent which would be caused by a quarter turn of the driving pulley 26'from the position s!"- own in .Fig. 2, the center I) of the gear Wi1eel31 having passed to a position-below the center a of the driving pulley, while the center (I of the pinion 30 has passed to a position above'the center 0 of counter shaft 29, it being understood that by reason of the intermeshing gears 27 and 28 being of the same size the travel of the center 1) of the gear wheel 27 in its orbit about the center a of the driving pulley is at the same speed as the travel of the center d of pinion 30 in its orbit about the center 0 of counter shaft 29,- though the travel of these centers 7) and l, is in opposite directions, as

indicated by'arrows. Thus, Whenthe .gear wheel 31 by reason of its eccentric mounting is in an intermediate .position between its position nearest to and its position farthest .from the counter shaft 29 the, eccentric pinion 30 is in position to present its medium distance from center to periphery thereto to remain in mesh therewith.

In the diagram of Fig. 6 the parts are indicated in outline as having-been moved to an extent which would be caused by another quarter turn of the driving pulley 26, the center thedriving pulley and the center 0 of the p1n1on30 and the center (i of. the counter shaft being again in alinement but in the order named, which differs from their order as shown in Fig. 2. The gear 31 is now inthe center d of the pincenter d b of the gear'31 and the center a of position to be farthest from the counter shaft 29 and the pinion 30 is in the position to present its greatest distance from center to periphery thereto, so as to remain in mesh therewith. p

In the diagram of Fig. 7 the parts are indicated in outline as an extent whichwould be caused by another quarter turn of the driving pulley 26, the center 6 of the gear 31 havin passed to a position above the center a o the driving pulley and the center d of the pinion 30 having passed to a position below the center a of the counter shaft 29. In this posi tion the gear wheel 31 is again in anintermediate position with relation to the counter shaft 29 and the eccentric pinion 30 of the latter has its intermediate distance from center to periphery presented thereto so as to remain in mesh therewith. 7

It will thus be seen that the eccentric position of the pinion 30 upon the counter shaft 29 counteracts the movements of the gear'wheel 31 toward and away from said countershaft by reason of the eccentric mounting of said gear wheel 31, so that notwithstanding such movements these parts remain in mesh at all times. So long as the having been moved to as the eccentricity of gear wheel 31, so that theorbit of travel of its center 0 about the of the counter shaft remains the same as the orbit of travel of the center I) of the gear wheel 31 about the center a of the driving pulley 26, the sizes of the pinion 30 and the gear wheel 31 may be varied at will to effect any desired ratio between the speed of rotation of the crushing head 19 and its speed of revolution. As shown in the drawings the relationin size of the pinion 30 to the gear its revolutions.

It is obvious that the gearing connection for the revolving spindle 21 may be maintained in various ways, either from the driving pulley ing means, and it is within the province of this invention to dispense entirely with -means for giving to the crushing head a term rotation meaning the movement of a body around its own center or axis, as the rotation of the earth upon its axis, and the term revolution meaning the movement of a body in an orbit about a point which may 31 is such that there will be two rotations of the. crushing head 20 to each of or from some independent drivrotary motion as be internal or external thereto; an example of the former being the revolution of an eccentric strap around an eccentric carried by a rotating shaft, and an example of the latter being the revolution of the earth around the sun. Thus, the movement of the crushing head 19 given to it by the turning of its spindle 21 within the sleeve 22 is a rotary movement, whereas the movement given to it by the turning of the sleeve itself, causing the spindle to travel in anorbit by reason of its eccentric mounting therein, is a revolvingl movement.

he revolving movement of the crushing head 19 caused by the eccentric mounting of the spindle 21 within the rotating sleeve 22 is what may be commonly termed a gyratory' movement, but this latter term is herein employed as having the more authoritative meaning of the combination of a rotar movement and a revolving movement. X definition of the word gyration appearing in the Standard Dictionary of the E ngZz's/E Language is The act of turning, as a body on its own axis of rotation, while simultaneously whirling about an axis of revolution.

The lower crushing head 18 is mounted in a. similar manner to the upper crushing head 19 and the respective parts are provided with the same reference numerals as the corresponding parts of the upper crushing head, except that these reference characters of the parts for the lower crushing'head are primed. The spindle 21, however, is solid instead of being tubular and the lower crushing head rests directly upon the roller thrust bearing 25, which in turn rests upon the upper end. of sleeve 22 and the roller thrust bearing 24 for supporting thesleew 22' rests upon bearing l-(iy Each of the driving pulleys, 26 and 26, is provided at a point opposite the spindle with an adjustable counterweight 32 to 1 counterbalance the centrifugal action caused by the eccentric mounting of the spindles with their crushing heads. I

The driving pulleys 26 and 26 may be driven in any direction and at any desirable speed, but they are preferably driven from the same belt, and therefore at the same ,speed, and in opposite directions by leading the belt from the pulley 26 around a vertical. drive pulley and then around pulley 26' in the opposite direction and finally around a vertical idle pulley and back to the upper driving pulley 26.

Material is fed to the central space between the crushing heads formed bythe dished parts of their crushing faces through the bore of the tubular spindle 21 and is there rolled between the revolving rotating surfaces, becoming crushed more and more as it moves outwardly between them through the combined effect of the centrifugal force and the revolving action of the crushing head.

This outward movement of the crushed 'material may be further assisted by a blast of air or a jet of water which may be introduced through a tube 33 running down the center of the bore of spindle 21 and held place therein in any desirable manner; as by spacing arms 34 fitting in the ends of the tubular spindle 21. Such tube 33 may have a flaring nozzle on its lower end to direct the jet or spray toward the meeting faces of the crushing heads and will then serve to-aid the material passing out from between the crushing heads when it has become thoroughly pulverized. When the'material has passed from between the crushing heads it falls to the casing 17 and is discharged through one or more openings or spouts 35 leading therefrom. k7

The degree of fineness of the work produeed may be regulated by a nut 36 threaded on the upper end of the tubular spindle 21 and bearing on the gear wheel 31, which supports the weight of the upper head by bearing upon the thrust bearing 25. By turning the adjusting nut 36 the upper crushing head 19 is raised farther from or lowered closer to the lower crushing head 18 to accomplish the desired adjustment.

It is obvious that certain of the beneficial results attending the use of the crushing mill above described may be accomplished by a structure wherein only one moving head is used, the other bemg stationarv, also-by a structure wherein the movement of a crushing head is a revolving movement without the rotary movement, orwhere rotarymovement is not positively imparted thereto but results from other movements, also by structures wherein the revolving movement of the i crushing heads is produced in the same direction and at different speeds, andtherefore this invention includes such modifications and various other structures making use of t e principles involved.

The most benefioial results of the present invention are believed to be due to the combined revolving and rotary movements of the crushing heads, or what may be termed their gyrating movements, and it is considered of material advantage that there should be a different speed between the rotary movements and the revolving movements to more evenly distribute the crushing action over the crushing surface of the crushing heads.

What I claim as my invention. is; v

1. A crushing mill, comprising a pair ..of crushing heads, a spindle on which one of the crushing'heads is mounted, a suitably journaled sleeve having an eccentric bearing in which the spindle is mounted, and driving means connected with the sleeve.

2. A crushing mill, comprising a pair of crushing heads, crushing faces on the crushing heads with dished center portions surrounded by a flat surface, the flat surfaces of the two crushing faces being in parallel its - planes, a tubular spindle on which one of the crushing heads is mounted forming ,a passage lea i crushing heads formed by the dished parts of their crushing faces, and means for imparting a revolvmgmovement to one of the crushing heads.

3; A crushing mill, comprising a pair of crushing heads, having dished center parts with surrounding flat surfaces, a tubular spindle on which one of the crushin heads is mounted forming a passageway or material leading to the space between the crushing hea s formed by the slished portions thereof, a tube assing through the tubular spindle for in ecting a fluid under Ipressure to the space between the crushing eads, and means for rotating one of the crushing heads. a 4. In an ore grinder a sleeve, a shaft eccentrically mounted within said sleeve with axis constantly parallel to the axis of the sleeve, means for rotating said sleeve and shaft at different speeds, a grinding disk supported upon said shaft and a grinding dis arranged'to bear against the face of said first dlsk.v x

5. In an ore grinder, a sleeve, a shaft eccentrically mounted within said sleeve 'and with its axis constantly parallel to the axis of the sleeve, means for rotating said sleeve and shaft, a grinding disk supported 11 on said shaft, and a grinding disk arrange to bear against the face of said flast'di'sjk.

- In an oregrinder, a sleeve, a shaft eccentrically mounted within said sleeve, with its axis constantly parallel to the axis of the sleeve, 'means for rotating" said sleeve, a grinding disk supported 'upon said shaft and a grinding disk arranged to bear against the face of said first disk.

7. In an ore grinder, a sleeve, a shaft ee centrically mounted therein with its axis parallel to the axis of the'sleeve,a rotative ng to the space between the 1,1ee,7eo

operative connection between said sleeve and shaft, means for applying ower to one of said 'rotati've elements, a grinding disk supported upon the shaft and agrindingdisk arranged to bear .against' the grinding face of said first disk.

8'.In' an ore grinder, two rotatingele- 9. In an ore grinder, a sleeve, a shaft, ec-

ments, namely, a sleeve and a shaft, said" centrically mounted within saidsleeve and with its axis constantly parallel to the axis. I

of the sleeve, means for rotating said sleeve and shaft, a grindin disk supported against rotation upon said s aft and a grindin disk arranged to bear against the facep said first disk. r p

10. In an ore-grinder, a sleeve, a shaft ececcentrically mounted within said sleeve, and with its" axis constantly parallel to the axis of the sleeve, means for rotating said sleeve and shaft at different speeds, a grind- =ing disk supgorted a ainst rotation u on said shaft an bear. a ainstthe face of said first disk.

11. 11 an orc grinder, a sleeve, a shaft mounted within said sleeve, and eccentric' is a grin ing. disk arrange to In testimony whereof, I afiix my signa- 8b ture, in presence of two witnesses.

JAMES D. MILLAR. Witnesses:

v R. S. O. CALDWELL,

ANNA F. SoHMm'rsAunR. 

